The seventeenth season of NCIS, an American police procedural drama television series, originally aired on CBS from September 24, 2019 through April 14, 2020.

NCIS revolves around a fictional team of special agents from the Naval Criminal Investigative Service, which conducts criminal investigations involving the U.S. Navy and Marine Corps.

[23] On March 13, 2020, CBS announced that the filming of season 17 had been suspended due to the COVID-19 pandemic.

Executive producer Frank Cardea teased a "very surprising ending" that was altered due to the pandemic.

Fans have speculated that this was either the exit of Maria Bello's Jacqueline Sloane (which was postponed until the Season 18 episode "True Believer") or an on-screen reunion of former main cast members Michael Weatherly and Cote de Pablo as Tony DiNozzo and Ziva David, though neither theory was confirmed.